KR-102962502-B1 - Compound for electrolyte, compound for electrolyte additive, electrolyte material, electrolyte additive, electrolyte for secondary battery and secondary battery

Abstract

The present invention relates to a compound for an electrolyte, a compound for an electrolyte additive, an electrolyte material, an electrolyte additive, an electrolyte for a secondary battery, and a secondary battery, and provides an electrolyte for a secondary battery comprising a novel compound or an isomer thereof.

Inventors

• 제종태
• 김기석

Assignees

• 에스에프씨 주식회사

Dates

Publication Date

20260508

Application Date

20231201

Priority Date

20221215

Claims (9)

1. Electrolyte for a secondary battery comprising a compound of the following chemical formula 1 or an isomer thereof: [Chemical Formula 1] In the above chemical formula 1, The above X is oxygen or sulfur; The above Y is oxygen or sulfur; The above Q1 , Q2 , and Q3 are each independently hydrogen, a substituted or unsubstituted C1-12 amine, a substituted or unsubstituted C2-12 heterocycloalkyl containing nitrogen, or a substituted or unsubstituted C3-20 heteroaryl containing nitrogen; However, excluding the case where all of the above Q1 to Q3 are hydrogen, The above chemical formula 1 is the following chemical formula 2 or chemical formula 3, and [Chemical Formula 2] [Chemical Formula 3] In the above Chemical Formula 2 or Chemical Formula 3, The above X is oxygen or sulfur; The above Y is oxygen or sulfur; The above Z1 and Z2 are each independently hydrogen, a substituted or unsubstituted C1-10 alkyl, a substituted or unsubstituted C1-10 alkenyl, a substituted or unsubstituted C1-10 alkynyl, a substituted or unsubstituted C3-10 amine, a substituted or unsubstituted C3-10 cycloalkyl, a substituted or unsubstituted C1-10 acyl, a substituted or unsubstituted C3-10 silyl, -SO2R1 , -SOR1 , -P (=G) R1R2 , a substituted or unsubstituted C1-10 heteroalkyl, a substituted or unsubstituted C2-12 heterocycloalkyl, a substituted or unsubstituted C1-10 alkoxy, a substituted or unsubstituted C6-20 aryl, or a substituted or unsubstituted C3-20 heteroaryl, or The above Z1 and Z2 may combine with each other to form a substituted or unsubstituted alicyclic ring containing one or more nitrogen atoms, or a substituted or unsubstituted aromatic ring containing one or more nitrogen atoms; The above W 1 is -SO-, -SO 2 -, -P(=G)(-R 1 )-, -C(=O)-, or -C(=O)C(=O)- and; The above W2 are each independently hydrogen, or a substituted or unsubstituted C1-10 alkyl; The above W3 is a substituted or unsubstituted C2-12 heterocycloalkyl, a substituted or unsubstituted C3-10 cycloalkyl, a substituted or unsubstituted C1-10 alkyl, a substituted or unsubstituted C1-10 acyl, or a substituted or unsubstituted C1-10 sulfonyl; The above G is oxygen or sulfur; R1 and R2 are each independently hydrogen, a substituted or unsubstituted C1-10 alkyl, a substituted or unsubstituted C1-10 alkenyl, a substituted or unsubstituted C1-10 alkoxy, a substituted or unsubstituted C1-10 alkynyl, a substituted or unsubstituted C3-10 amine, a substituted or unsubstituted C3-10 cycloalkyl, a substituted or unsubstituted C2-12 heterocycloalkyl, a substituted or unsubstituted C1-10 acyl, a substituted or unsubstituted C3-10 silyl, a substituted or unsubstituted C6-20 aryl, or a substituted or unsubstituted C3-20 heteroaryl.
2. delete
3. In paragraph 1, An electrolyte for a secondary battery, wherein the above-mentioned substituted alkyl, alkenyl, alkynyl, amine, cycloalkyl, acyl, silyl, heteroalkyl, heterocycloalkyl, alkoxy, aryl, heteroaryl, alicyclic ring, aromatic ring, or sulfonyl is substituted with one or more substituents selected from the group consisting of halogen group, alkyl group, alkenyl group, alkynyl group, heterocycloalkyl group, ketone group, thioketone group, alkoxy group, alkenyloxy group, alkynyloxy group, heteroaryl group, cycloalkyl group, hydroxyl group, carboxyl group, carbonate group, amine group, silyl group, sulfonate group, phosphate group, thiophosphate group, nitro group, cyano group, heteroalkyl group, aryl group, ether group, and acyl group.
4. In paragraph 1, An electrolyte for a secondary battery, further comprising an additive selected from the group consisting of LiPO2F2 , unsaturated cyclic carbonates, cyclic sulfones, nitrile compounds , and mixtures thereof.
5. In Article 1, The above electrolyte for a secondary battery comprises at least one compound selected from the group represented by the following chemical formula, or an isomer thereof: .
6. In Article 1, Electrolyte for a secondary battery, further comprising an organic solvent.
7. In Article 1, The compound of Chemical Formula 1 above is an electrolyte for a secondary battery, provided as an electrolyte additive.
8. In Article 1, The above secondary battery is a lithium-ion battery, and the electrolyte for the secondary battery.
9. An electrode assembly comprising an anode, a cathode, and a separator separating the anode and the cathode; A case for housing the above electrode assembly; and A secondary battery comprising an electrolyte according to claim 1 that is accommodated in the above case and immersed in the electrode assembly.

Description

Compound for electrolyte, compound for electrolyte additive, electrolyte material, electrolyte additive, electrolyte for secondary battery and secondary battery The present invention relates to a compound for an electrolyte, a compound for an electrolyte additive, an electrolyte material, an electrolyte additive, an electrolyte for a secondary battery, and a secondary battery. Lithium secondary batteries are used as power sources for portable electronic devices such as video cameras, mobile phones, and laptop computers. Rechargeable lithium secondary batteries have an energy density more than three times higher per unit weight and enable high-speed charging compared to conventional lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. Since lithium-ion batteries operate at high operating voltages, aqueous electrolytes that are highly reactive with lithium cannot be used. Organic electrolytes are generally used as electrolytes for lithium-ion batteries. Organic electrolytes are prepared by dissolving lithium salts in an organic solvent. It is desirable for the organic solvent to be stable at high voltages, have high ionic conductivity and dielectric constant, and possess low viscosity. Meanwhile, the voltage, lifespan, capacity, and stability of a battery can vary significantly depending on the materials used for the cathode, anode, and electrolyte. Therefore, there is a need for electrolytes and electrolyte additives for lithium secondary batteries that can provide lithium secondary batteries with improved lifespan characteristics and high-temperature stability. FIG. 1 shows a cross-sectional view of a secondary battery comprising an electrolyte and an electrolyte additive according to one embodiment of the present invention. Figure 2 shows the results of analyzing the room temperature lifespan performance of a secondary battery according to one embodiment of the present invention. Figure 3 shows the results of analyzing the high-temperature life performance of a secondary battery according to one embodiment of the present invention. <Explanation of Symbols> 1: Secondary battery 10: Top case 20: Spring 30: Spacer 40: Anode 50: Separator 60: Cathode 70: Gasket 80: Lower case One embodiment of the present invention is illustrated in the accompanying drawings. However, the present creative concept may be embodied in many other forms and should not be interpreted as being limited to the embodiments described herein. Rather, these embodiments are provided to ensure that the present disclosure is thorough and complete and will sufficiently convey the scope of the present creative concept to those skilled in the art. Identical reference numerals denote identical components. The terms used herein are intended to describe specific embodiments only and are not intended to limit the creative concept. Unless the content clearly indicates otherwise, the singular form used herein is intended to include the plural form including “at least one.” “At least one” should not be interpreted as limiting to the singular. As used herein, the term “and/or” includes any combination of one or more of the listed items. The terms “comprising” and/or “comprising” as used in the detailed description specify the presence of the specified features, regions, integers, steps, actions, components, and/or components, and do not exclude the presence or addition of one or more other features, regions, integers, steps, actions, components, components, and/or groups thereof. Unless otherwise defined, all terms used in this specification (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which this disclosure pertains. Furthermore, it will also be understood that terms as defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning within the context of the relevant technology and the content of this disclosure, and should not be interpreted in an idealized or overly formal sense. Although specific embodiments have been described, alternatives, modifications, variations, improvements, and substantial equivalents that are not currently anticipated or cannot be anticipated may arise to the applicant or those skilled in the art. Accordingly, the appended claims, which may be filed and modified, are intended to include all such alternatives, modifications, variations, improvements, and substantial equivalents. In the present invention, the term "isomer" refers to a compound of the present invention or a salt thereof that has the same chemical formula or molecular formula but differs structurally or stereochemically. Such isomers include structural isomers such as tautomers, R or S isomers having an asymmetric carbon center, stereoisomers such as geometric isomers (trans, cis), and optical isomers (enantiomers). All of these isomers and mixtures thereof are also included within the scope of